You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
1.4 KiB
31 lines
1.4 KiB
config NTB_IDT
|
|
tristate "IDT PCIe-switch Non-Transparent Bridge support"
|
|
depends on PCI
|
|
help
|
|
This driver supports NTB of cappable IDT PCIe-switches.
|
|
|
|
Some of the pre-initializations must be made before IDT PCIe-switch
|
|
exposes it NT-functions correctly. It should be done by either proper
|
|
initialisation of EEPROM connected to master smbus of the switch or
|
|
by BIOS using slave-SMBus interface changing corresponding registers
|
|
value. Evidently it must be done before PCI bus enumeration is
|
|
finished in Linux kernel.
|
|
|
|
First of all partitions must be activated and properly assigned to all
|
|
the ports with NT-functions intended to be activated (see SWPARTxCTL
|
|
and SWPORTxCTL registers). Then all NT-function BARs must be enabled
|
|
with chosen valid aperture. For memory windows related BARs the
|
|
aperture settings shall determine the maximum size of memory windows
|
|
accepted by a BAR. Note that BAR0 must map PCI configuration space
|
|
registers.
|
|
|
|
It's worth to note, that since a part of this driver relies on the
|
|
BAR settings of peer NT-functions, the BAR setups can't be done over
|
|
kernel PCI fixups. That's why the alternative pre-initialization
|
|
techniques like BIOS using SMBus interface or EEPROM should be
|
|
utilized. Additionally if one needs to have temperature sensor
|
|
information printed to system log, the corresponding registers must
|
|
be initialized within BIOS/EEPROM as well.
|
|
|
|
If unsure, say N.
|
|
|
|
|